Water-jacketed valve-cap and spark-plug.



C. EL JOHNSON.

WATERJACKEWD VALVE GAP AND SPARK HUG.

APPLICATION FILED IUNE 1, i917.

LQQLS@ aitomm (im. 8,19%.

@nomment-ton el Letters .i2-atene.

implication lerl June l, 191'?. Serial llo. 332,218.

To ati' 'Lv/"tom may concern:

1g1v--iii"-ET-v f ne it inoiin that l., anni aoHnson,

a citizen oit' the ldnlted States, residing at St. laul, in the county of llanisey and tjtate of Minnesota, have invented certain new Aand useful improvements in. tlater-Jacltmorethan the usual means for keeping theV valves and plug` cool, to prevent burning out and sticking.

A further object of the invention is to provide .liruiness in the cap by increasing its bearing surface ou the cylinder end, nud this is secured by joining it to the cylinder along an oblique line instead of at a right angle to the piston rod, and by sloping this angle or line oi juncture inwardly towardl the valve side of the cylinder l bring the water jacket ofthe cap closer to the valves than would otherwise be the case, thereby securingl both firmness in the cap and cooling the valves by means oit' this formation of the cap and its jacket. j

in the accompanying drawing,

.Figure l is a longitudinal section through the cylinder end adjacent the cap and through the cap, the piston and one alve beingl shown in. elevation.

lfig. 2 is a section on tlie line 2 2 of F l.

lfig. 3 is an enlarged plan 7lien' of the cylinder l'iead, the cap being ren'ioved.

rThe device can be adapted for engines having' any desired number ot' cylinders but for ,illustration it shown applied to a single cylinder.

.ln the drawii'igs l designates the cylinder Wall, 2 the jacket Wall and 3 the water jacket. A piston l works in the cylinde and in the inlet is arrangcdtlie faires, one indicated at (i, facing shown.

Sleeves 7 are formed integral With Walls -tire across the water jacket o 8 and l0 oi" the water jacket on 'the valve side ot' the cylinder, the wall 8 being the inner wall and orining also the wall of the gas intake ai This wall slopes obliquely with respect to the sleeves 7, which. extend on eacli side et' it, the sleeves extending enat this point. The `valve rods 9 worli through 'these sleeves and irre provided. with the usuel exterior springs 1l.

'llie ca p l2 joins the cylinder end on the oblique line 13 having its greatest thickness on the Valve side, and contains o, water jacket l-l, Vwhich jacket entirely surrounds the spari: plug lo, the walls this point being as thin as possible. The water outlet l5 leads from the cap on the side opposite the `falves. Coniiniunication is eil'ected loel tween the jacket 3 and the jacket l: by the passages l? and 18. 'ilie water inlet is shown at 19, and the course ot witter through the jackets and around the valves and plug is indicated by the arrows.

lliis construction provides the maximum amount ot' cooling; for both the valves and the sparl plug.

lvl/'hat Ll claim ist@ l. rlhe combination with an inteinal com hustion engine having e water jacltet, of a hollow valve and spark plug can having its greatest thickness at the 1valve side, and having a line olf -juncture with said engine cylinder alongi a line oblique with. respect to the longitudinal anis of the cylinder, and the interior et' the cap having; communica tion "with the water jacket et said engine.

The eou'iliination with an interred comn luis-tion engine, having; a water jacket :ind jaclteicd Valves of a hollow' cap lining' a watt-i' jacket, smid cap joining the engine cylinder on :in ohli ne lr the Water iaeliet ol. the cup having ii;l gre; capacity ad jacent the valves. and hating an outl opposite said valves, said miler jacket of the cap having free connnunication with that ot' the engine, and a spark plug carried by the cap and sui-rounded on the sides by the cap water jacket.

in an cngfinc of the type described lievingi a water jacket, valves and gas inlet, *valve stem sleeves formed integral with the 'leo Walls of the jacket, the inner jacket wall being oblique with respect` to the sleeves, and a hollow cap having an inclined inner face of juncture with said engine, Jthereby 5 increasing the bearing surface of the cap and bringing the Water space insaid cap into proximity with said valves, said cap having communication with the Water jacket of the engine and having an outlet on the side opposite the valves, and a spark plug l@ carried by and passing through the Water jacket of the cap.

n testimony whereof affix my signature.

CARL E. JOHNSON. 

